Preheat oven to 450°. Place roast on a broiler pan coated with cooking spray. Combine thyme, salt, pepper, and 4 garlic cloves; rub over roast. Bake at 450° for 45 minutes. Reduce heat to 350° (do not remove roast from oven). Bake roast at 350° for 1 hour and 20 minutes or until a thermometer reg...